{"id":2188,"date":"2026-02-22T11:09:46","date_gmt":"2026-02-22T06:09:46","guid":{"rendered":"https:\/\/dqs.uz\/?p=2188"},"modified":"2026-02-22T11:09:46","modified_gmt":"2026-02-22T06:09:46","slug":"raschet-sobstvennogo-predela-ognestojkosti-metallokonstrukczij","status":"publish","type":"post","link":"https:\/\/dqs.uz\/uz\/2026\/02\/22\/raschet-sobstvennogo-predela-ognestojkosti-metallokonstrukczij\/","title":{"rendered":"Metallning o\u2018ziga xos yong\u2018inga chidamlilik chegarasi"},"content":{"rendered":"

Himoyasiz metall konstruksiyalarning yong\u2018inga chidamliligi.<\/strong><\/h4>\n

Mazkur tushuncha R15 yong\u2018inga chidamlilik chegarasiga ega bo\u2018lishi talab etiladigan po\u2018lat konstruksiyalarning yong\u2018inga qarshi ishlov berish zaruratini aniqlashda dolzarb hisoblanadi.<\/p>\n

ShNK 2.01.02-04 \u201cBinolar va inshootlarning yong\u2018in xavfsizligi\u201d me\u2019yorlariga ko\u2018ra, binolarning II darajali yong\u2018inga chidamliligida tom konstruksiyalari, agar tomning har bir elementi o\u2018ziga xos yong\u2018inga chidamlilik chegarasi R8 dan kam bo\u2018lsa, yong\u2018inga qarshi ishlov berishni talab qiladi.<\/p>\n

Metallning o\u2018ziga xos yong\u2018inga chidamlilik chegarasi \u2014 bu metall konstruksiya yong\u2018inga qarshi himoyasiz holda standart yong\u2018in sharoitida yuk ko\u2018tarish qobiliyatini saqlab turadigan vaqt davridir.<\/p>\n

Ko\u2018pincha buyurtmachilar loyiha hujjatlarini ishlab chiqishda, tom konstruksiyasiga tushadigan yuklarni hisoblash jarayonida tejamkorlik maqsadida loyihachilardan yuklama hisobiga mos keladigan minimal metall sortamentini qo\u2018llashni talab qiladilar. Odatda bunday holatlarda 50x50x6 o\u2018lchamdagi burchak profili kabi elementning o\u2018ziga xos yong\u2018inga chidamlilik chegarasi R8 dan past bo\u2018lib, umumiy loyihaviy ko\u2018rsatkichlarga salbiy ta\u2019sir ko\u2018rsatadi. Natijada buyurtmachi tom konstruksiyasini yong\u2018inga qarshi tarkib bilan qo\u2018shimcha ishlov berish uchun qo\u2018shimcha moliyaviy mablag\u2018 sarflashiga to\u2018g\u2018ri keladi.<\/p>\n

Amaliy tajribamiz va hisob-kitoblarimiz shuni ko\u2018rsatadiki, iqtisodiy jihatdan kattaroq kesimli metall sortamentidan foydalanish maqsadga muvofiq bo\u2018lib, bu ShNK 2.01.02-04 \u201cBinolar va inshootlarning yong\u2018in xavfsizligi\u201d talablarini bajarishga hamda tomni yong\u2018inga qarshi ishlov berish ishlaridan voz kechishga imkon beradi.<\/p>\n

Mosalkov I.L., Plyusnina G.F., Frolov A.D. mualliflarining \u201cQurilish konstruksiyalarining yong\u2018inga chidamliligi\u201d (tahrirchi: V.I. Kuznetsov, Moskva, Spetstekhnika, 2001) kitobida turli keltirilgan qalinlikka ega himoyasiz metall konstruksiyalarning standart yong\u2018in sharoitida (vaqt bo\u2018yicha harorat oshishining standart sinov egri chizig\u2018i) haroratga bog\u2018liqligi bo\u2018yicha ma\u2019lumotlar keltirilgan.<\/p>\n

Quyida ushbu bog\u2018liqliklarning grafiklari keltirilgan.<\/p>\n

Himoyasiz po\u2018lat konstruksiya elementlarining qizish vaqtiga bog\u2018liq ravishda harorat o\u2018zgarishi.<\/strong><\/p>\n

\"\u043f\u0440\u0435\u0434\u0435\u043b
Yong\u2018inga qarshi himoyasiz yong\u2018inga chidamlilik chegarasi<\/figcaption><\/figure>\n

Qizish \u201cstandart\u201d yong\u2018in rejimi (1-egri chiziq) bo\u2018yicha amalga oshirilgan.<\/p>\n

Egri chiziqlardagi raqamlar metallning turli keltirilgan qalinliklariga mos keladi.<\/p>\n

Mazkur grafiklar yordamida 500 \u00b0C haroratga yetganda yuk ko\u2018tarish qobiliyati yo\u2018qolishi sharti asosida himoyasiz po\u2018lat konstruksiyalarning haqiqiy yong\u2018inga chidamlilik chegarasini aniqlash mumkin. 500 \u00b0C harorat chizig\u2018i bilan kesishgan nuqtadan \u201cVaqt\u201d o\u2018qiga tushiriladi va yong\u2018inga chidamlilik chegarasi aniqlanadi.<\/p>\n

Keltirilgan qalinlik \/ 500 \u00b0C gacha qizish vaqti koordinatalari bo\u2018yicha kritik haroratga erishish vaqti va po\u2018lat konstruksiyaning keltirilgan qalinligi o\u2018rtasidagi bog\u2018liqlik quriladi. Egri chiziq trend chizig\u2018i (nuqtalar orasidagi o\u2018rtacha to\u2018g\u2018ri chiziq) orqali approksimatsiya qilinadi va quyidagi bog\u2018liqlik olinadi:<\/p>\n

Y = 0,64*X + 7,2<\/p>\n

Masalan, keltirilgan kesimi 17,85 mm bo\u2018lgan po\u2018lat konstruksiyaning kritik haroratga yetish vaqtini aniqlaymiz:<\/p>\n

Y=0,64*17,85+7,2<\/p>\n

Y=18,60<\/p>\n

Mazkur konstruksiya uchun yong\u2018inga chidamlilik chegarasi 18,60 daqiqani tashkil etadi.<\/p>\n

 <\/p>\n

Shuningdek, grafikdan ham foydalanish mumkin.<\/p>\n

\"\u0417\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u044c<\/p>\n

Nima uchun tom metall konstruksiyalarining yong\u2018inga chidamliligini hisobga olish muhim?<\/h4>\n

Tomning metall konstruksiyalariga tushadigan yuklarni hisoblashda nafaqat mustahkamlik, balki metallning keltirilgan qalinligini ham inobatga olish zarur, chunki u \u043f\u0440\u0438\u0432\u0435\u0434\u0451\u043d\u043d\u0443\u044e \u0442\u043e\u043b\u0449\u0438\u043d\u0443 \u043c\u0435\u0442\u0430\u043b\u043b\u0430<\/strong>,bevosita o\u2018ziga xos yong\u2018inga chidamlilik chegarasiga ta\u2019sir qiladi.<\/strong>.
Loyihalash bosqichidayoq ferma va tom konstruksiyalarining yong\u2018inga chidamliligini yong\u2018inga qarshi tarkiblar yordamida oshirish zarurati mavjud yoki yo\u2018qligini aniqlash lozim.<\/strong> Bu kelgusida loyihani qayta ishlash, ekspertiza e\u2019tirozlari va ortiqcha xarajatlarning oldini oladi.<\/p>\n

Biz loyihalash bosqichida yordam beramiz<\/h4>\n

Kompaniyamiz mutaxassislari metall konstruksiyalarning, jumladan tom fermalari va qoplamalarining yong\u2018inga qarshi himoyasini professional<\/strong>hisob-kitob asosida amalga oshiradilar.
Biz texnik topshiriq va loyihalash bosqichida jarayonga ulanib, yong\u2018inga qarshi<\/strong>ishlov berish zarurati bo\u2018yicha maslahat beramiz hamda ShNK 2.01.02-04 talablariga muvofiqlik ta\u2019minlaymiz.<\/strong>.<\/p>\n

\ud83d\udc49 Yong\u2018inga chidamlilik va yong\u2018inga qarshi himoya hisobini loyiha bosqichidayoq buyurtma qiling \u2014 vaqt va budjetni tejang hamda ekspertizadan birinchi urinishda o\u2018ting.<\/strong><\/p>\n

Yangi mijozlar uchun birinchi yong\u2018inga<\/strong> qarshi himoya hisobi BEPUL<\/strong>.<\/p>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

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